linux-kernel - Re: [PATCH v2] misc: Silence warning when building the LAN966x device tree overlay

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Message-ID: <20241025192117.0cf20075@bootlin.com>
Date: Fri, 25 Oct 2024 19:21:17 +0200
From: Herve Codina <herve.codina@...tlin.com>
To: Philipp Zabel <p.zabel@...gutronix.de>
Cc: Stephen Rothwell <sfr@...b.auug.org.au>, Rob Herring <robh@...nel.org>,
 linux-kernel@...r.kernel.org, linux-next@...r.kernel.org, Arnd Bergmann 
 <arnd@...db.de>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH v2] misc: Silence warning when building the LAN966x
 device tree overlay

On Fri, 25 Oct 2024 18:53:46 +0200
Philipp Zabel <p.zabel@...gutronix.de> wrote:

> On Fr, 2024-10-25 at 18:17 +0200, Philipp Zabel wrote:
> > Silence the following warning when building the LAN966x device tree overlay:
> > 
> > drivers/misc/lan966x_pci.dtso:34.23-40.7: Warning (interrupts_property): /fragment@..._overlay__/pci-ep-bus@...ic@...c0120: Missing interrupt-parent
> > 
> > Reported-by: Stephen Rothwell <sfr@...b.auug.org.au>
> > Link: https://lore.kernel.org/all/20241025110919.64b1cffb@canb.auug.org.au/
> > Fixes: 185686beb464 ("misc: Add support for LAN966x PCI device")
> > Signed-off-by: Philipp Zabel <p.zabel@...gutronix.de>
> > ---
> > The referenced commit is in the reset tree.
> > Changes in v2:
> > - Do not handle W=1 warnings.
> > - Link to v1: https://lore.kernel.org/all/20241025145353.1620806-1-p.zabel@pengutronix.de/
> > ---
> >  drivers/misc/Makefile | 1 +
> >  1 file changed, 1 insertion(+)
> > 
> > diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
> > index 885b22989580..196fb730817e 100644
> > --- a/drivers/misc/Makefile
> > +++ b/drivers/misc/Makefile
> > @@ -72,6 +72,7 @@ obj-$(CONFIG_TPS6594_PFSM)	+= tps6594-pfsm.o
> >  obj-$(CONFIG_NSM)		+= nsm.o
> >  obj-$(CONFIG_MARVELL_CN10K_DPI)	+= mrvl_cn10k_dpi.o
> >  lan966x-pci-objs		:= lan966x_pci.o
> > +DTC_FLAGS_lan966x_pci		:= -Wno-interrupts_property
> >  lan966x-pci-objs		+= lan966x_pci.dtbo.o
> >  obj-$(CONFIG_MCHP_LAN966X_PCI)	+= lan966x-pci.o
> >  obj-y				+= keba/  
> 
> Applied to reset/next to silence the warning until lan966x_pci.dtso is
> fixed:

This warning 'Missing interrupt-parent' cannot be solved in dtso.
I cannot reference the interrupt controller (PCI device node itself) which
is outside the dtso. This PCI device node is the node on which the dtso
is applied.

I think the patch you did is the correct one for this warning.

Related to other warnings mentionned in v1:
  Warning (simple_bus_reg): /fragment@..._overlay__/pci-ep-bus@...pu_clk: missing or empty reg/ranges property
  Warning (simple_bus_reg): /fragment@..._overlay__/pci-ep-bus@...dr_clk: missing or empty reg/ranges property
  Warning (simple_bus_reg): /fragment@..._overlay__/pci-ep-bus@...ys_clk: missing or empty reg/ranges property

I will update the dtso and send the related patch.

Best regards,
Hervé

> 
> [1/1] misc: Silence warning when building the LAN966x device tree overlay
>       https://git.pengutronix.de/cgit/pza/linux/commit/?id=68152eff5240
> 
> regards
> Philipp